Refrigerated food and drink dispensing cabinet and method of cooling liquids



Sept. 23 1924.

J.R.REPLOGLE ET AL REFRIGERATED FOGD AND DRINK DISPENSING CABINET AND METHOD OF COOLING LIQUIDS Filed Sept. 6. 1923 3 Sheets-Sheet 2 Sept.23,1924. l r 1,509,812

J. R. REPLOGLE ET AL REFRIGERATED FOOD AND DRINK DISPENSING CABINET AND METHOD OF' COOLING LIQUIDS Filed Sept. 6. 1.923 .'5 Sheets-Sheet. 5

. 10 Drink Dispensing 35v pansion coils or by brine Peteur-ed sepezs, 1924.

j 1,509,812. X UNITEDQSTATES PATENT orifice.`

JOHN B. BVEPLOGL, OF DETROIT, MICHIGAN, ANDVHABRY J. WALKER, OF CHICAGO, ILLINOIS; SAID RIITPYIJOGIIEv ASSIGNOB yT NIZER LABORATORIES COMPANY, OF DETROIT, IICHIGAN, A CORPORATION 0F MICHIGAN.

mammal) loon AND DRINK nIsrENsINe CABINET AND METHOD or cooLINe LIQUIps.

'Application mea september To all whom it may concern.'

Be it known that We, JOHN R.' Rnrmonn and HARRY J. WALKER, citizens ofv the United States, residing, respectively, atDetroit, inthe county of Wayne and State of Michigan, and at Chicago, in the county of Cook and vState of- Illinois, have invented.'

,certain new and useful Improvements 1n and Relating to Refrigenated Food and Cabinets and Methods of Cooling Liquids, of which the following is a specification, reference being made therein to the 'accompanying drawings.

The invention relates to what are commonly known as soda fountains such as are `used for the dispensing of ice-cream soda,

ice cream, and various forms of drinks.

In soda fountains for dispensing both, icecream and drinks, as heretofore constructed, it has been customary to provide one orl more holes for` the reception of bulk' icecream canswith asurrounding mpartment in which a cracked ice and salt mixture is packed to keep the cream hard; and in addition a compartment has been provided for coils through which the various liquids or drinks on draft are passed, this compartment being kept cold either by crushed ice or, as in the so-called iceless fountain, by the cooling effect of the salt and ice mixture in the adjacent ice-cream compartment. There have been some instances also in which soda fountains have had their various sections or compartments lcooled by direct excoils of mechanicalrefrigeration plants. In some of .these cases the brine coils ofthe fountain have been connected with the brine system of large refrigeration plants installed in the building. In other cases, the direct expan- 'sion coils or the brine coils of the fountain -have been connected with a refrigerant compressor plant separate from the fountain but designed to serve only the fountain.

In none of these various prior' systems, whether ice-cooling or mechanical refrigeration was employed, has there been satisfactor provision for `the maintenance lof suitab y different temperatures in the differentsections or compartments of the, fountain. Tokeep ice-cream. hard a lower temperature is` required than is permissible in e, 1923. serai No. 661,136.

' connection with soda water and other drinks without freezing them. Thus in the case of the iceless fountains, the lack of suitable temperature control for the various sections has resulted sometimes in the freezing of the soda water or other drinks in the coils when the draft of these liquids happens to be infrequent. And in the case of the mechanically refrigerated fountains heretofore employed, the maintenance of different suitable temperatures in the different sections of the fountain has been dependent yupon the supervision of an attendant, with the result that freezing of the soda water coils occurred When there was a lack of close su ervision. In the case of fountains coole by brine coils connected with a large refrigeration system, since the temperature requisite for keeping ice-cream hard is below that requisite for many other services, it has been difficult to induce the refrigeration engineer -in charge to maintain.. the low temperature suitable forthe ice-cream service.

One of the principal objects of the present invention is the provision of -a self-contained fountain comprising a compartment for solid food such as ice-cream, a coolingcom' partment for `drinks on draft, preferably also a dry cold compartment for bottled goods or other products to be maintained at a low temperature, and an automatically controlled refrigeration apparatus adapted without attention to maintain the several compartments at different suitably low` temperatures, as well as the usual soda fountains adjuncts, such as receptacles for crushed fruit flavors, Syrups, cracked ice, and dishwashing facilities.

Another ob' ect of the invention is the pro-,

vision of improved means for maintaining a suitable low temperature of soda water and other, liquids on draft without danger of freezing such liquids in the draft pipes.

Another' obj ect of the invention isv the provision of a fountain having an ice-cream section and a soda water section automatically maintained at suitably different low temperatures by means of a common mechanical refrigerating apparatus.

A furtherobjectof provision of a fountain such as that last referred to above in which a dry compart the invention is the perature above the freezing pointof water. A further object of the inventlon 1s the provision of an improved method of cooling liquids on draft, said method being characterized by an inherent automatic temperature control.

Other objects of thel invention more or less ancillary or incidental to the foregoing will appear from the following description in connection with the drawings.

In the drawings, Fig. 1 is a plan view of a founta-inembodying our improvements.

Fig. 2 is a rear elevation of the fountaln.

Fig. 3 is a horizontal sectional view of the fountain, the section being taken on the line 3-3,`Fig. 4, and some of the arts being broken away atone end of the ountain.

Fig. 4 is a vertical section on the line 4 4, Fig. 3.

Fig.- 5 is a section on the lines 5 5, Figs. 3 and 4. j

Fig. 6 is an enlarged section on the l1ne 6 6, Fig. 3.

Referring in detail to the construction j, illustrated, the-fountain has a suitable frame structure comprising a bottom wall 1, on which are arranged, longitudinal frame members 2 and 3, longitudinal top frame members 4 and 5which are supported by suitable uprights 6, 7, 8 and 9 from said lower frame members 2 and 3. The longitudinal frame members 4 and 5 carry trans- 1n its entiretyY by 14and which is made up in being below the main top -Wall 14. At the verse frame members 10, 11, 12 and 13 (see Fig. 4) and these latter with the longitudinal members 4 and 5 and other suitable frame parts, not shown, support the main top wall of the fountain, which is designated part of stationary sections and in part of movable sections of wood or other heat insulating material, as will later be explained. i Looking at the fountain from the rear it has at the left end a machine' section or compartment 15 which houses a motor-driv- -en compressor4 and a condenser of a mechanical refrigerating apparatus, adjacent the machine section on the right a food section 16 to hold ice-cream, next to said food section a 'cold chamber or compartment 17 'for bottled'goods and .the like and at the right end of thel cabinet a section 18 for cooling liquids on draft, all vof these sections front side of the Vcabinet 'and extending practically throughout its length is a longitudinal trough-like compartment 19 which is arranged to receive the usual dispensing jars 20, 20 for flavoring syrups and crushed fruits, as well as boxes 21, 21 fitted with hinged lids and adapted to hold cracked ice. On this longitudinal compartment 19 are mounted the usual draft arms 22, 23,

24 and 25 fitted with the usual hand valves for the draft of soda water, drinking water, ginger ale, or the like.

The series of compartments 16, 17 and 18 is surrounded by a bottom wall 26, front and rear walls 27 and 28 and end Walls 29 and 30 of cork or other suitable heat-insulating material. The sections 16 and 17 are also separated by a wall 31 of cork or the like. The walls 28, 29 and 30 are provided with suitable sheet metal covers 32, 32.

The left end 0f. the cabinet is referably closed by a finishing wall or s ab 33 of marble, opal glass, or the like. Similarly the front of the cabinet is finished with a wall 34 of marble or opal glass and the top of this wall carries a counter-like slab 35 of similar material. The rear side of th machine compartment 15 is provided with an opening closed by a suitable door 36. At the right end of the fountain is provided the usual dishwasliing sink 37 with drain board 38.

n Referring now in greater detail to the features to which our improvements more especially relate, the food section 16 comprises a tank 39 of sheet cop er or other suitable metal adapted to hod an anti- .freezing solution such as brine or a mixture of alcohol and water. For convenience we shall hereafter sometimes referto the said solution as brine. Extending downward into this tank are three cylindrical opentopped chambers 40, 4() adapted to receive five-gallon cans of bulk ice-cream.

The cylindrical sleeves constituting the walls of these chambers extend from the top to the bottom of the tank 39 and are thus surrounded by the cooling solution, as shown in Fig. 5. Above these compartments 40 the top Wall 14 is formed with similar openings adapted to receive correspondingly shaped covers 41, 41 of the usual sort. Two of the compartments 40 are separated from the front wall of the tank 39 by a partition 39, which extends the full depth of the tank and performs a function which will later be explained.

Toward thefront side and near the left end of the tank 39, and immersed in 'the antifreezing solution therein, is the vaporizer 42 of a mechanical refrigeration apparatus. As far as the present invention is concerned, this vaporizer may be of any desired or suitable construction. Theone illustrated is like that of the refrigeration apparatus disclosedin the pending application Serial No. 475,344, filed June 6, 1921, of John R. Replogle, one of these applicants, and in Letters Patent to France, o. 547,971 to which reference may be had for a detailed showing and description of the vaporizer and the compressor mechanism associated with it. For the purpose of the present invention it is sufiicient to note that the vaporizer comprises a header 42* and a series `-of depending circulating Vtubes 42". One end of the VYthe adjacent end wall of the tank 39.

In the compartment of the machine sectioii of the fountain is mounted the power-A driven compressor and the condenser mechanism of the refrigeration apparatus. This mechanism, which is illustrated in outline A only, may be 'of any known suitable construction, that illustrated being substantially the same as that shown in the aforesaid application Serial No. 47 5,344 and in the afore said Letters Patent to France No. 547,971.

In so far as the present inventionis concerned,

it will be sufficient to note that the mechanism comprises a compressor 43, driven through suitable reduction gearing by an electric motor 44, a condenser 45, electric switch mechanism 46, pressure devices 47 and 48 for automatically actuatingthis switch mechanism and suitable refrigerant connections 49 and 50 between the condenser, vaporizer, compressor, and pressure devices 47 and 48. The pressure devices 47 and 48 are responsive to temperature changes in the anti-freezing solution in the tank 39 andare adapted to maintain the temperature of, this solution at a temperature well below 32. F. suitable for keeplng ipe-cream in the chambers hard. As above indicated, any suitable' automatic refrigeration apparatus adapted to perform this function can be used in so far-as the present invention is concerned.

The section 17 for cooling bottled goods `and the like com rises an open-trp sheet ily had metal tank 51 to W ich access 1s rea` by the hinged cover 52 which constitutes part .of thetop wall 14 of the cabinet.

The section 18 for cooling liquids on draft comprises an open-top sheet metal tank 53 to which, similarly, access is afforded by a hinged cover 53, the tanks 51Yand 53 having a common sheet metal wall 53. The tank 53 is filled with water to about the level in dicated in Fig. 4. Immersed in the water in this tank are a series of three coils 54, and 56 preferably nested one within 4the other, as illustrated. The ends, 54, 55", 56", of these coils aie connected with sources of supply of,

' say, ginger-ale, soda-water, and plain drinklng water, while their other ends, 54h, 55", 56h, are connected to conduits 57, 58 and 59, respectively. The conduit 57 is connected with the draft arm 25. The conduit 58 divides and its branches, 58* and 58", lead to the draft arms 22 and 24, respectively, and

the conduit 59 leads to the draft arm 23.

arranged a cooling fluid conduit section in coohn iuid will be setup t rou vits other side. f

fountain, andthe upper end of the conduit A section 60 is connected by. a' pipe 62 with, the

upper part of the tank 39,l the arrangement being such that a thermalsi hon flow of-th the pipe 61 an section t 60 and the pipe 62. A dciector plate 60Il is preferably provided in the conduit section 60, so thatthe cold-solution" entering through the pipe 61 is spread throughout the said section. The pipe 61 'is fitted with a hand-operated gate valve 63` by which the flow of cooling solution can be more or less throttled.

In the operation of our improved foun-l tain the automatic switch ,device 46 of the refrigerant compressor mechanism causes the operation of the latter whenever the temperature of the brine in the tank 39 of the food section 16, and consequently the temperature within the vaporizer 42, rises above a certain predetermined point. The operation of the compressor results in a lowering of the temperature of the brine in the tank 39 and when said temperature is reduced to a certain point the switch mechanism 46 is automatically opened and the operation of the compressor stopped. In this way, by the periodic operation of the compressor mechanism the temperature of the brine in the tank 39 is automatically maintained within certain relatively close limits well below the freezing point of water and suitable for keeping ice-cream in the compartments 40 in a satisfactory hard condition.

In the meantime, the absorption of heat the brine conduit sections 61, 60, -62 from the fountain sections 17 and 18 results in a thermal Siphon action causing a circulation of brine from the tank 39 through the pipe 61, box section 60 and pipe 62 back to the tank 39. As the brine, at a temperature well below the freezing point of water flows through the conduit section 60, the water in the tank 53, adjacent said tank .on its side and end walls is cooled and flows cated by the arrows in Fig. 6. By giving the conduit section 60 the flat box form illustrated and dis osin it near one side of the tank 53, a wel de ned, convection current Vis set up and eddy curents,which `would result from the use of`an irregularly formed conduit section in lieu of the conduit section 60 illustrated, are avoided. Furthermore,

' the conduit section 60 serves in eii'ect as a Near the front side of .the tank 53 and spaced away from the coils 54, 55and 56, is

partition wall which partially cuts olf the tank space on one side' of it from that on `Since the temperature of the anti-freezing solution is'well below 32 F. the temperature of the water in contact with the conduit section 60 is soon reduced to the freezing point and ice begins to form around the said section 60. After a time the. ice thus formed completely fills the space between the front side of the conduit section 60 and the adj-acent front wall of the tank 53, and also between the end walls of the section 60 and the adjacent side walls of tank 53 and between the bottom of the section 60 and the bottom wall of said tank. Thus circulation of water between the front and end walls of the conduit section 60 and the adjacent tank walls is entirely cut `off and confined to the larger-space between the rear side of the conduit section and the frear wall of the tank 53. This greatly reremains available as a path for flow of heat from the water in the tank to the antifreezing solution. After the circulation. is thus cut off between the front side of the conduit section 60v and the adjacent wall of the tank, the formation of ice on the other side of the section 60 continues for a time but, as ice is a poor conductor of heat, a point is finally reached at which heat cannot be absorbed from the water remaining in the tank 53 throughthe iceand into "the brine in the conduit section 60 to a sufficient extent to cause further formation of ice. This slowing down and final stopping of the fiow of heat from the water in the tank to the conduit 60, is furthered by the fact Vthat the thermal Siphon flow of the brine in the conduit 60 diminishes as the fiow of heat from the water to the brine decreases, so that, yas the layer of ice on the conduit 60 increases, there is both a decreased heatl head and an increased resistance to heat fiow between the water in the tank and the brine in the conduit. With the conduit seetion and the coils 54, 55 and 56 suitably disposed in relation to each other and the valve 63 properly set the formation of ice ceases before` the ice encroaches materially upon said coils.

In this manner, the temperature of the water in the tank 53 is maintained approximately at or slightly above the freezing point by a method and an ap aratus that are inherently automatic. onsequently, danger of freezing the liquids on draft in the cooling coils 54, 55, 56, is entirely obviated.

The formation of a definitely llimited amount of ice lin the tank 53 has the great advantage that when the amounts of liquids drawn through the cooling coils are' relatively small, the maximum amount of .ice

which can form is produced, and a large reserve cooling ca acity thus stored corre spending to the atent heat of the ice and this reserve cooling capacity thereafter becomes available when abnormall large drafts of soda water and other drinks are made.

The valve 63 is provided so that the apparatus can be adjusted to different operating conditions, such for example, as the conditions at different seasons of the year. With the valve 63 once adjusted for given conditions, no further su e-rvision of the cooling of the liquid cois 54, 55, 56, is necessary. If the apparatus is to be used under fairly uniform conditions, the valve 63 can be omitted and the effective size of the cooling fluid conduit be proportioned to control the fiow of the fluid, as will be readily understood.

The bottled goods section 17 of the fountain is kept amply cooled and at a sufficiently uniform temperature by the cold brine flowing through the pipes 61 and 62 and by the low vtemperature of the tank wall 53'L which has water and ice at approximately freezing temperature on one side of it. The cooling effect of the pipes 61, 62, and the wall 53 is supplemented by the other side walls and the bottom wall of the tank 51 because these walls arein direct metal contact with the wallsof the tank 53. In fact, in practice the two tanks are formed by placing a partition wall (53) across a single tank. Thus, it will be understood, considerable heat is absorbed from the walls of tank 5l by `conduction through those walls to the walls of tank 53 which are in contact with the cold water therein.

The warmer brine returning through the pipe 62 into the tank 39 is prevented from coming into direct contact with the icecream chambers 4() by the partition 39 which directs such Warmer brine into direct contact with the vaporizer 49. by which it i's-cooled before contacting with the walls of said chambers 40.

It will now be understood that we have produced in a self-contained fountain structure cooling sections or compartments for (a) food such as ice-cream, (b) liquids on draft and (c) bottled goods or the like, and cooling and -refrigerating apparatus which is adapted automatically to maintain thc different suitable temperatures in the respective sections or compartments. The ar rangement of the mechanical refrigeration apparatus in a section or compartment at one end of the fountain where access can be had to it readily and without preventing access to the other'sections of the fountain and where it does not interfere with the desired relative arrangement of the food and drink section, will readily be appreciated. In this connection, it is observed that we do not in this application make claim to the relative arrangement of the machine section `or compartmentI 15 at one end of the cabinet structure and ad'acent' to a food section in the appended claims.

What we claim is 1. In drink dispensing apparatus, the

ycombination in a unitary structure of asection4 for cooling liquids on draft comprising a water-holding tank, a coil immersed in the water in said tank adapted to be connected at one end-with the source of supply of liquid and at its other end with the draft means of the apparatus, and a conduit for cooling uid also immersed in said water; means` for causin flow of cooling fluid through said con uit; and a section for bottled goods and the like disposed adjacent the water-holding tank and comprising a dry chamber se arated from the Water in said water-hol ing tank by a heat conducting wall. I

2. In drink dispensing apparatus, the combination in a unitary structure of asection for cooling liquids on draft comprising a water-holding tank with metal walls, a coil immersed in the water in said tank adapted to be connected at one end with the source of supply of liquid and at its other end with the draft means of the apparatus,

and a conduit forcooling fluid also immersed in said water; means for causing ow of cooling fluid through said conduit;

and a section for bottled goods and the like disposed adjacent the water-holding tank Supply through the said dry cham and comprising a-dry chamber having metal side and bottom walls directly connected to the walls of said water-holding tank and with one of its walls in direct 'contact with the water in the latter tank.

3. In drink dispensin apparatus, the combination of a section or cooling liquids on draft comprising a water-holding tank,

a coil immersed in the water in said tank adapted to be connected at one end with the source of supply of liquid and lat its other end with the draft mea-ns of the ap aratus and a conduit for cooling fluid a so immersed in said water; a section for bottled ygoodsand the like comprislng a dry chamber separated from the water in said waterholding tank by a heat-conducting wall; a conduit for coolin fluid extending er and connected to the cooling fluid conduit immersed inthe water; and means whereby cooling Hui/d is caused to flow through said supplyand cooling fluid conduits.

4:. In food and drink dispensing apparatus, the combination of a food section havin a tank for holding cooled anti-freezing so ution and a lfood chamber extending into said tank so as to be surroundedvb' said solution; means for cooling said so ution; a section for coolin liquids on draft comprisin a water-ho ding tank, a coil immerse in the water in said tank adapted to be connected at one end with the .source of supply of liquid and at 'its other end with the draft means of the apparatus and a conduit for cooling fluid also immersed in said'v l water; a conduit extending from the bottom part of the tank in the food section'to and connected with the bottom part of the cools ing duid conduit in said water tank; areturn conduit connected to the upper art of said cooling iluid conduit' and. exten ing to and communicating with the upper part of the tank in the food section; and a section for bottled goods and the like comprising a dry chamber separated from the water in said water-holding tank by a heat-conducting wall.

5. In food vand drink dispensing apparatus, the combination of a food section havin a tank for holding cooled anti-freezing solution and a food chamber extending into said tank so as to be surrounded by said solution; means for cooling said solution; a section'forcoolin liquids on draft comprising a water-holding tank, a coil immersed in the water in said tank adapted to be connected at one endwith the source o su ply of liquid and at its-other end with the raft means of the apparatus and a conduit vfor cooling fluid also immersed in said water; a section for bottled goods and the like interposed between the other two sections and comprising a dry chamber separated rom .the water in said waterholding tank ly a heat-conducting wall; a 'conduit exten in from the bottom part of the tank in the foo section to and connected with the bottom part of the cooling u'id conduit in said water tank; a return conduit connected to the upper part ofsaid cooling fluid conduit and extending tov and communicating with the upper part of the tank in the fluid section; and a manually adjustable valve in one of said cooling iiuid conduits adapted to throttle the flow of cooling luid through said conduits to any `desired extent.

6. In food and drink dispensing apparatus, the combination of a food section having a tank for holding lcooled antifreezing solution anda food chamber extending into said tank; means for cooling said solution; a section for cooling liquids on draft comprising a water-holdingA tank, a

adapted to be connected at one end with the Isource of sup lly of Aliquid and at its other end with "t e draft means of the apparatus and a conduit for cooling fluid also immersed. in said water; a section for bottled goods-and the like interposed between the v.other two sections and comprismg a dry chamber separated from the. water l in said water-holding tank by a heat-conducting Wall; a conduit connected with the lower part of the tank in the food section and extending through the said dry chamber into the water tank and connected with the bottom part of the cooling fluid conduittherein; and a return conduit connected with the upper part of the said cooling fluid conduit and extending through the said dry chamber to andin connection with the upper part of the tank in the food section.

7. In food and drink dispensing apparatus, the combination of a food section having a tank forv holding cooled antifreezing solution and a food chamber extending into saidtank; means for cooling said solution; a section for cooling liquids on draft comprising a water-holding tank,

a coilimmersed in the water in said tank4 adapted to be connected at one end with the source of supply of liquid and at itsz'other end with the draft means of the apparatus and a conduit for cooling fluid also immersed in said Water; a section for bottled goods and the. like interposed between the other two sections and comprising a dry chamber separated from the water in said waterdiolding tank by a heat-conducting Wall; a conduit connected with the lower part of the tank in the food section and extending through the said dry chamber into the Water tank and connected with the bottom part of the cooling fluid conduit therein; a return conduit connected with the upper part of the said cooling fluid conduit and extending through the said dry chamber to and in connection with the upper part of the tank in the food section; and a' manually adjustable valve in one of said conduits extending through said dry chamber adapted to throttle the flow of cooling fluid therethrough to any desired extent.

8. In a. food and Y drink dispensing cabinet. the combination in a unitary stiucture of a food section having a tank for holding anti-freezing solution, a refrigerant vaporizer disposed in said tank so as to be immersed in said solution, and a food chamber extending into said tank so as to be immersed in said solution; a refrigerant compressor section at one side of the food section comprising a power-driven refrigerant compressor and condenser apparatus operatively connected with the said land and the like comprising a dry chamber separated from. the, water in said waterholding tank by a heat-conducting wall; a conduit extending from the. bottom part of the tank in the food section to and connected with the bottoni part of the cooling fluid conduit in said water tank; and a return conduit connected to the upper part of said cooling fluid conduit and extending to and communicating with the upper part of the tank in the. food section.

9. In apparatus for cooling liquids on draft, the combination of a water-holding tank, a coil immersed in the .water in said tank and adapted to be connected at one end with the source of supply of liquid and at its other end with the draft means; a closed-circuit conduit for cooling-fluid providing a path for free circulation of said fluid and having a section thereof extending through the water in said tank with an intervening space between it and said coil; and means for extracting heat from thc, cooling fluid in another section of said conduit to maintain its temperature below 32 l"., whereby the absorption of heatby the cooling fluid from the water in the tank sets up a thermal siphon circulation of the cooling fluid through its conduit and causes the formation of ice around said conduit without freezing tlie liquid in the coil, the amount of ice formed and the circulation of the cooling fluid being automatically limited by the heat insulating property of the ice.

10. In apparatus for cooling liquids on draft` the combination of a water-holding tank, a coil innnersed in the water in said tank and adapted to be connected at one end with the source of supply of liquid and at its other end with the draft means, a conduit for cooling fluid extending. upward through the water in said tank and disposed at one side of said coil, said conduit comprising an upright flat box-like. part, means for causing a limited flow through said conduit of cooling fluid at :i temperature below 32 l whereby an automatically limited amount of ice'is frozen around said conduit without freeicing the liquid in said coil.

l1. in apparatus for cooling liquids on draft, the combination of a water-holding tank, a coil immersed in the water in said tank and adapted to be connected at one end with the Source of supply of liquid and at its other end with the draft means, a

lll() llb l1,509,312' v l I "1 l' 'I i '7 i conduit' `for cooling lluid-l extending upward through the water in said tank and disposed.

\\ at one side of said coil, said l,conduit comside walls ofthe tank and its top wall below the upper level of the water in the tank, and means for causing a limited` flow through said conduit of cooling fluid at' a temperature below 32 'I|`., whereby an automatically limited amountof ice is frozen around saidconduit without freezing the liquid in said coil.

12. In food and drink ldispensing appa? ratus, the combination of a food section having a tank for holding cooled anti-freezing solution and a food chamber .extending into said tank so as to be surrounded by said solution; means for cooling said solution; a section for cooling liquids on draft comprising a water-holding tank,v a coil immersed in the water in said tank adapted to be connected at one end with the source of supply of liquid and at its other endv withthe draft means of the apparatus anda. conduit for coolin fluid also immersed in said water; a con uit extending from the bottom part of the tank in the food;J section to and connected with the bottom part of the cooling fluid conduit in said water tank; and a return conduit connected to the upper part of said cooling fluid conduit and extending'to and communicating withthe upper part of' the'tankin the food section. l

13. In food and drink dispensing a paratus, the combination of a food section aving a tank for holding cooled anti-freezing solution and a food chamber extending into said tank so as to be surrounded b solution; means for cooling said so ution; a section for cooling liquids on draft comprising a water-holding tank,v a coil immersed inthe water in said tank adapted to bev connected at one end with the. source of supplyv of liquid and at its other end with the draft means ofthe apparatus and a 'conduit for cooling Huid extending upward through the water in said tank with an intervening space between it and. said coil; a conduit/extending from the bottom part of the tank' 'n the food section to and connected with the bottom part of the cooling fluid conduit in said watertank; anda' return arto'f said cooling liuid conduit and exten ing'to -and communicating with the upper part of the tank in the food' section. v

14. In' vfood and drink dispensing appa-` ratusl,` the combination of afood section hav-1.

ing a tank for lholding cooled anti-freezing solution and a food chamber extending into.

V"said tank so as1to be surrounded by said solution; means for cooling said` solution;

4tank in the said of supply of liquid and at its other end with the draft means of the apparatus and a conduit for cooling fluid extending upward through the water in said tank andy disposed at one side of said coil, said conduit comprising an upright flat box-like part; a conduit extendin from the bottom part of the ood section to and connected with the' bottom part of the cooling iuid conduit in said water tank; and a return conduit connected to the upper part of said cooling fluid conduit and extending to and communicating with the upper part of the tank in the food section.

15. In food and drink dispensing appa-` ratus, the combination of a food section having a tank for holding cooled anti-freezing 'solution and a food chamber extending into said .tank so as to be surrounded by said solution;` means for cooling said solution; a section for cooling liquids on/*draft comprising a water-holding tank, a coil immersed in the water in said'tank adapted .to be connected at one end with the source of supply of liquid andl at its other end with the draft means of the apparatus and a conduit for cooling Huid extending upward' through the water in saidtank and disposed at one sideof said coil said conduit cornprising an upright fla box-like part disposed near but spaced rom one side wall of the tank and with its bottom andnarrower side walls spaced away from the bot- 'tom and adjacent side walls of the tank and its top wall disposed below the upper level of the water in the tank; a conduit extending from the bottom part of the tank in the food'rse'ction to and connected with the bottom part' of the cooling fluid conduit in said water tank; and a return conduit connected to the u per part of said cooling fluid conwith the upper part of the tank in the food section.v

v16. In a food and drink dispensing cabinet, the combination of a food section having a tank for holding cooled anti-freezing solution-and a food chamber extending into said tank so as to be surrounded by said solution; asection for cooling liquids on draft comprising a water-holding tank, a coil immersed inthe water in said tank adapted to be connected at one end with the source of supply of liquid and at its other end with the draft means of the cabinet and a conduit for cooling iiuid also immersed jin said water' and connected with the tank 'duit an extending to and communicating.

maintalning the temperature of the antifreezing v"solution of the *food compartment 17. In apparatus for cooling liquids ondraft, the combination of a-water-holding tank comprising bottom and side walls; a

coil immersed in the water in said tank and adapted to be connected at one end with the source of supply of liquid and at its other end with the draft means; aninterior partition-like structure disposed in the tank between the coil and a side wall ofv the tank and constructed' and arranged to permit circulation of the water in the tank from one side to the other of the partitionlike` structure; and means for maintaining one of the said structure and side wall parts at a temperature below 82 F. to absorbv heat from the water in the tank and cause the formation of ice between said structure and side wall and thereby stop the said circulation of water. A

18. In apparatus for cooling liquids on draft, the combination of a Water-holding tank comprising bottom and side walls; a coil immersed in the water in said tank and adapted to be connected at one end with the source of supply of liquidP and at its other end with the draft means; an interior/paiv tition-like structure disposed in the tank between the coil and a side wall of the tank With its top below the level of the top of the tank and an intervening space between its' bottom and the bottom wall of the tank so as toQ permit circulation of water from one side to the other of parf tition-like structure; and means for maintaining one of the said structure and side wall parts at a temperature below 32 F. to absorb heat from the water in the tank and cause the formation of ice between said structure and side wall and the said circulation of water.

19. The method of cooling liquid on draft which comprises passing the liquid through a coil immersed ina tank of water, passthereby stop ing a cooling fluid at a temperature below 32 F. by thermal siphon action through a conduit immersed in saidwater with an intervening space between the coil and conduit until the water surrounding the conduit freezes, and automatically regulating the thema] Siphon flow of the cooling fluid by the heat insulating, propertypf the ice frozen around the conduitto stop the further formation `of such ice before it encroaches sufficientlyl upon the said coil to freeze the liquid on draft'. i

20. The method Vof -cooling liquids on draft which comprises vpassing thel liquid through a coil immersed in a tank of water, causing a cooling fiuid at a temperature below 32 F. to HOW by thermal siphonl action through a conduit immersed in said Water with an interveninnr space between the coil and conduit unti the Water surrounding the conduit freezes, and regulatingthe flow of said cooling fluid so that the formation of ice around said conduit is automatically stopped before it encroaches sufficiently upon the said coil to freeze the liquid on draft.

21. The method `of cooling liquid on draft which comprises passing the liquid through a coil immersed in a tank of water, passing a cooling Huid at a temperature below 32 F. through a conduit immersed in said water adjacent the wall of the tank and with an intervening space between it and the said coil until the water surrounding the conduit freezes and cuts olf thermal circulation of the water between said conduit and the said tank wall, and regulating the flow of said cooling fluid so that the formation of ice around the conduit is automatically stopped before 'it encroaches suiiciently upon the said coil to freeze the liquid on draft.

In testimony whereof, we hereunto affix our signatures.

JOHN R. REPLOGLE. HARRY J. IVALKER. 

